1311235134044 has 48 divisors (see below), whose sum is σ = 2684735383680. Its totient is φ = 553992978240.

The previous prime is 1311235133977. The next prime is 1311235134049. The reversal of 1311235134044 is 4404315321131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311235134044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311235134049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14752514 + ... + 14841129.

It is an arithmetic number, because the mean of its divisors is an integer number (55931987160).

Almost surely, 2^{1311235134044} is an apocalyptic number.

It is an amenable number.

1311235134044 is an abundant number, since it is smaller than the sum of its proper divisors (1373500249636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311235134044 is a wasteful number, since it uses less digits than its factorization.

1311235134044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29593730 (or 29593728 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 1311235134044 in words is "one trillion, three hundred eleven billion, two hundred thirty-five million, one hundred thirty-four thousand, forty-four".